A water lane running through tall cypress trees covered with Spanish moss on Caddo Lake near Uncertain, Texas. Visitors to this lake tucked away in Texas' forested northeast corner find a mysterious labyrinth of swamps and bayous that are home to a vast array of wildlife – from owls to eagles to alligators

A group of male chimpanzees attack an adult male from another community. The victim is at the bottom of the pile of attackers and hidden from view. Chimpanzee gangs kill to seize new territory, a new study has found

The Houbara bustard is a sandy-coloured resident of deserts, with its distribution ranging from North Africa to Mongolia. Females that observed highly displaying male birds in the experiment were more fertile and had a greater breeding success due to an increased allocation of testosterone into their eggs, leading to an increase in the growth rate in chicks

A baby beluga whale named Nala swims with her mother Aurora moments after being born at the Vancouver Aquarium in Vancouver in 2009. The aquarium announced on 22 June that Nala died of a respiratory condition overnight and had been sick for two weeks